Is this a data flow diagram?
I am unsure on whether or not this (link) is a data flow chart or a flowchart? I am unsure because it seems too much like a block diagram to be a data flow diagram.
The difference between a flow chart and a data flow diagram is that a data flow diagram provides a point where data is entered into the system and a point where data exits the system. The definition as provided by Wikipedia:
A data flow diagram (DFD) is a graphical representation of the "flow" of data through an information system, modeling its process aspects
A flow chart basically shows the flow of events not necessarily including the flow of data. It shows a process through which the program flows. A flow chart is defined by Wikipedia as:
A flowchart is a type of diagram that represents an algorithm, workflow or process, showing the steps as boxes of various kinds, and their order by connecting them with arrows
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